A farm raises 450 ducks, which is 150% of chickens. The number of geese raised is 15% of that of chickens. How many geese are raised in this farm?
某饲养场养鸭450只，是鸡的150%．养鹅只数是鸡的15%，该饲养场养鹅多少只？
<gadget id="calculator">150 / 100</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">450 / (3/2)</gadget>
<output>300</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">300 * (3/20)</gadget>
<output>45</output>

<result>45</result>