tofu workshop can make 140 kg of tofu with 35 kg of soybeans. Now there are 200 kg of soybeans, and 860 kg of tofu is needed. How many kilograms of soybeans are left?
一个豆腐坊，用35千克黄豆可以做出140千克豆腐，现在有200千克黄豆，要做860千克豆腐，还差多少千克黄豆？
<gadget id="calculator">140 / 35</gadget>
<output>4</output>

<gadget id="calculator">860 / 4</gadget>
<output>215</output>

<gadget id="calculator">215 - 200</gadget>
<output>15</output>

<result>15</result>