Under normal circumstances, the ratio of the length of a person's feet to his height is 1:7. Uncle Li's feet are 28 centimeters long. What is his height in meters?
一般情况下，人的脚长与身高的比是1：7，李叔叔的脚长28厘米，他的身高大约是多少米．
<gadget id="calculator">7 * 28</gadget>
<output>196</output>

<gadget id="calculator">196 / 100</gadget>
<output>49/25 = around 1.96</output>

<result>49/25 = around 1.96</result>