A batch of toys has produced 360 pieces, and the ratio of the remaining ones to the number already produced is 4:5. How many toys are there in this batch?
一批玩具，已经生成了360个，这时剩下的与已经生产的个数的比是4：5，这批玩具有多少个？
<gadget id="calculator">360 / 5</gadget>
<output>72</output>

<gadget id="calculator">4 + 5</gadget>
<output>9</output>

<gadget id="calculator">72 * 9</gadget>
<output>648</output>

<result>648</result>