The toy factory wants to produce a batch of toys. It is planned to produce 660 pieces per day, and it will be completed in 12 days. Now it will be completed in 11 days. How many more pieces should be produced every day?
玩具厂要生产一批玩具，计划每天生产660件，12天完成，现在要11天完成，每天要多生产多少件？
<gadget id="calculator">12 / 11</gadget>
<output>12/11 = around 1.090909</output>

<gadget id="calculator">660 * (12/11)</gadget>
<output>720</output>

<gadget id="calculator">720 - 660</gadget>
<output>60</output>

<result>60</result>