Zhang Dong has to do 200 crossing calculation problems. He did 60 in 3 minutes. Calculated in this way, how many minutes will it take him to finish these oral calculations?
张东要做200道口算题．他3分钟做了60道．照这样计算，他做完这些口算题要多少分钟？
<gadget id="calculator">60 / 3</gadget>
<output>20</output>

<gadget id="calculator">200 / 20</gadget>
<output>10</output>

<result>10</result>