There are 43 pieces of candy, and they are distributed to 5 children on average, each child has 8 pieces, how many pieces are left.
有43块糖，平均分给5个小朋友，每个小朋友8块，还剩多少块．
<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<gadget id="calculator">43 - 40</gadget>
<output>3</output>

<result>3</result>