The school plans to buy footballs with a unit price of 34.5 yuan. In fact, 207 yuan is used to buy 30 skipping ropes. The unit price of the skipping ropes is the amount of footballs.
学校计划购买单价是34.5元的足球，实际上从买足球的钱中拿出207元买了30根跳绳，跳绳的单价是足球的多少．
<gadget id="calculator">207 / 30 / 34.5</gadget>
<output>0.2</output>

<gadget id="calculator">100 / 100</gadget>
<output>1</output>

<gadget id="calculator">0.2 * 1</gadget>
<output>0.2</output>

<result>0.2</result>