Xiaohong’s home is 1 kilometer away from school. Xiaohong started walking to school from her home. She has walked for 15 minutes at a rate of 64 meters per minute. How many meters is she still away from school?
小红家到学校有1千米，小红从家出发步行去学校，已经走了15分钟，每分钟走64米，她离学校还有多少米？
<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">64 * 15</gadget>
<output>960</output>

<gadget id="calculator">1_000 - 960</gadget>
<output>40</output>

<result>40</result>