train (7/8) traveled 210 kilometers in an hour, how many kilometers per hour on average?
一列火车(7/8)小时行了210千米，平均每小时行多少千米？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">210 / (7/8)</gadget>
<output>240</output>

<result>240</result>