A toy factory originally needed 4.5 yuan of materials to make a plush rabbit. Later, the production method was improved, and each material only needed 4.2 yuan. I originally planned to make 280 plush rabbits, how many can I make now?
一个玩具厂做一个毛绒兔原来需要4.5元的材料．后来改进了制作方法，每个只需4.2元的材料．原来准备做280个毛绒兔的材料，现在可以做多少个？
<gadget id="calculator">280 / 4.2</gadget>
<output>66.666667</output>

<gadget id="calculator">4.5 * 66.666667</gadget>
<output>300.000001</output>

<result>300.000001</result>