If S represents distance, V represents speed, and T represents time, then when V=42 km/h T=5.5 hours S=how many kilometers.
如果用S表示路程，Ⅴ表示速度，T表示时间，那么当Ⅴ=42千米/小时T=5.5小时S=多少千米．
<gadget id="calculator">42 * 5.5</gadget>
<output>231</output>

<result>231</result>