I hope that the primary school will build a 200-meter runway, and 160 meters have been built. How many times has it been repaired?
希望小学修一条200米的跑道，已经修了160米，已经修的是没有修的多少倍？
<gadget id="calculator">200 - 160</gadget>
<output>40</output>

<gadget id="calculator">160 / 40</gadget>
<output>4</output>

<result>4</result>