rectangular piece of land is 20 meters long and long (7/10) wide. What is the area of this piece of land in square meters?
一块长方形地，长20米，宽是长的(7/10)，这块地的面积是多少平方米？
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">20 * (7/10)</gadget>
<output>14</output>

<gadget id="calculator">20 * 14</gadget>
<output>280</output>

<result>280</result>