A fountain pen is 16 yuan, and the price of a brush is 3/4 of that of a fountain pen. How much is a brush?
一支钢笔16元，一支毛笔的价格是钢笔的(3/4)，一支毛笔多少元？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">16 * (3/4)</gadget>
<output>12</output>

<result>12</result>