What is (3/4) the area of a circle with a diameter of 4 cm in square centimeters?
直径是4厘米的圆的面积的(3/4)是多少平方厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3.14 * 4 * (3/4)</gadget>
<output>9.42</output>

<result>9.42</result>