The speed of a tractor is 500 meters per minute, and a truck is 250 meters per minute faster than the tractor. How many kilometers per hour can the truck travel?
一台拖拉机的速度是500米/分，一辆卡车每分钟比拖拉机快250米，这辆卡车每小时能行驶多少千米？
<gadget id="calculator">500 + 250</gadget>
<output>750</output>

<gadget id="calculator">60 / 1_000</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">750 * 1 * (3/50)</gadget>
<output>45</output>

<result>45</result>