The children's mall shipped 400 boxes of children's building blocks, and after selling for 3 months, there were 61 boxes left. (ask questions and answer)
儿童商场运进400盒儿童积木，卖了3个月还剩61盒．(提出问题并解答)
<gadget id="calculator">400 - 61</gadget>
<output>339</output>

<gadget id="calculator">339 / 3</gadget>
<output>113</output>

<result>113</result>