The base of a triangle is 30 meters and the height is 1/3. What is the area of the triangle in square meters?
一个三角形的底是30米，是高的(1/3)，这个三角形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">30 / (1/3)</gadget>
<output>90</output>

<gadget id="calculator">30 / 2</gadget>
<output>15</output>

<gadget id="calculator">90 * 15</gadget>
<output>1_350</output>

<result>1_350</result>