Xiaohong said: "The length of my step is about 35cm, and I walked 640 steps from home to school at an even pace." What is the approximate distance from home to school?
小红说："我1步的长度大约35cm，以均匀的步子从家到学校走了640步"．问从家到学校的距离大约是多少米？
<gadget id="calculator">35 / 100</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">640 * (7/20)</gadget>
<output>224</output>

<result>224</result>