The school has a total of 36 volleyballs and basketballs, of which (4/9) are volleyballs. How many volleyballs are there?
学校有排球和篮球一共36个，其中(4/9)是排球，排球有多少个？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">36 * (4/9)</gadget>
<output>16</output>

<result>16</result>