A racing car travels 45 kilometers in 15 minutes. According to this speed, 1 hour and 45 minutes to run the entire race. How long is the whole race?
一辆赛车15分钟行驶45千米．按照这样的速度，1小时45分钟跑完整个赛程．整个赛程有多长？
<gadget id="calculator">45 / 15</gadget>
<output>3</output>

<gadget id="calculator">3 * 105</gadget>
<output>315</output>

<result>315</result>