For a rectangular land, the length is 42 meters and the width is the length (5/7). What is the area of the land in square meters?
长方形的地，长42米宽是长的(5/7)，这块地的面积是多少平方米？
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">42 * (5/7)</gadget>
<output>30</output>

<gadget id="calculator">42 * 30</gadget>
<output>1_260</output>

<result>1_260</result>