# Automatic Checking

### Try the automatic checker!

Check if the example is correctly calculated

Then replace it with your own calculation.

{ "type": "solutionelement", "name": "solutionelement-checkerdemo", "metadata": {}, "data": { "contents": [{"id": "sdelement-demodata"}], "contentdata": { "sdelement-demodata": { "type": "sdelement", "name": "sdelement-demodata", "metadata": {}, "data": { "dstepdata": { "stask-onlineuser-20181107103818788-911": { "readonly": false, "task": [ { "text": "Calculate $3\\frac{1}{2}\\unit{l}\\cdot k$ -- the kilometers travelled ", "type": "calculate", "readonly": false, "fillable": false, "attrs": {}, "answer": { "text": "$28\\unit{km}$ -- the answer", "readonly": false, "fillable": false, "attrs": {} } } ], "assumption": [ { "label": "a", "text": "$k=8\\unit{\\frac{km}{l}}$ -- milage, how may kilometers per liter", "readonly": false, "fillable": false, "attrs": {} } ], "observation": [], "derivmotivation": [ { "text": "calculate the value of the expression", "readonly": false, "fillable": false, "subshidden": false, "subderiv": [], "attrs": {} } ], "term": [ { "text": "3\\frac{1}{2}\\unit{l}\\cdot k", "readonly": false, "fillable": false, "attrs": {} }, { "text": "\\frac{7}{2}\\unit{l}\\cdot8\\unit{\\frac{km}{l}}", "readonly": false, "fillable": false, "attrs": {} }, { "text": "\\frac{7}{2}\\cdot8\\unit{km}", "readonly": false, "fillable": false, "attrs": {} }, { "text": "28\\unit{km}", "readonly": false, "fillable": false, "attrs": {} } ], "relation": [ { "text": "=", "readonly": false, "fillable": false, "attrs": {} }, { "text": "=", "readonly": false, "fillable": false, "attrs": {} }, { "text": "=", "readonly": false, "fillable": false, "attrs": {} } ], "motivation": [ { "text": "change to simple fraction and use assumption", "readonly": false, "fillable": false, "subshidden": false, "subderiv": [], "attrs": {} }, { "text": "simplify the sorts", "readonly": false, "fillable": false, "subshidden": false, "subderiv": [], "attrs": {} }, { "text": "caculate", "readonly": false, "fillable": false, "subshidden": false, "subderiv": [], "attrs": {} } ] } }, "caption": { "text": "Example solution:", "readonly": true, "fillable": false, "attrs": {} }, "dsteps": [ { "id": "stask-onlineuser-20181107103818788-911", "type": "task" } ] } } } } }