Mingming departs from home at 7:00 a.m. to go to grandma's house by car, and arrives at 10:00 a.m. The car travels 80 kilometers per hour. How many kilometers is it from Mingming's house to grandma's house?
明明早晨7时从家出发乘车去奶奶家，上午10时到达，汽车每小时行80千米，明明家距奶奶家多少千米？
<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<result>240</result>