A rectangular piece of land is 90 meters long and its width is 1/3 of its length. What is the area of the land in square meters?
一块长方形地，长为90米，宽比长短(1/3)．这块地的面积是多少平方米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">90 * (2/3)</gadget>
<output>60</output>

<gadget id="calculator">90 * 60</gadget>
<output>5_400</output>

<result>5_400</result>