If a certain milk powder contains 25% fat, how many grams of fat are in 450 grams of milk powder?
如果某种奶粉含脂肪25%，那么450克奶粉中含脂肪是多少克．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">450 * (1/4)</gadget>
<output>225/2 = around 112.5</output>

<result>225/2 = around 112.5</result>