To make a batch of parts, if you make 200 parts a day, you can finish them in 15 days. Now you have to finish them in 12 days. How many parts are you making on average every day? (proportional solution)
做一批零件，如果每天做200个，15天可以做完，现在要在12天完成，平均每天做多少个？(比例解)
<gadget id="calculator">200 * 15</gadget>
<output>3_000</output>

<gadget id="calculator">3_000 / 12</gadget>
<output>250</output>

<result>250</result>