40% of the weight of a basket of apples is exactly 30 kg, what is the weight of 12% of the basket of apples?
一筐苹果重量的40%正好是30千克，这筐苹果的12%是多少千克．
<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">30 / (2/5)</gadget>
<output>75</output>

<gadget id="calculator">12 / 100</gadget>
<output>3/25 = around 0.12</output>

<gadget id="calculator">75 * (3/25)</gadget>
<output>9</output>

<result>9</result>