Distribute a basket of oranges to the children. If each person divides 2 oranges, the difference is 3. If each person divides 3 oranges, the difference is 4. Ask: How many children are there?
一筐橘子分给小朋友，每人分2个则多3个，每人分3个则差4个，问：小朋友有多少人．
<gadget id="calculator">3 + 4</gadget>
<output>7</output>

<gadget id="calculator">3 - 2</gadget>
<output>1</output>

<gadget id="calculator">7 / 1</gadget>
<output>7</output>

<result>7</result>