The driver Lao Li transported 200 tons of goods on the first day and 150 tons on the second day, earning 1,000 yuan more on the first day than on the second day. How much is a ton?
司机老李第一天运货200吨，第二天运货150吨，第一天比第二天多挣1000元．运一吨多少元？
<gadget id="calculator">200 - 150</gadget>
<output>50</output>

<gadget id="calculator">1_000 / 50</gadget>
<output>20</output>

<result>20</result>