Measure the length of a living room on a (1/100) floor plan and its length is 5 cm and its width is 4 cm. What is the area of this living room in square meters?
在(1/100)的平面图上量得一间客厅的长是5厘米宽是4厘米，这间客厅的面积是多少平方米．
<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">4 / (1/100) / 100</gadget>
<output>4</output>

<gadget id="calculator">5 / (1/100) / 100</gadget>
<output>5</output>

<gadget id="calculator">4 * 5</gadget>
<output>20</output>

<result>20</result>