To make a batch of cotton-padded clothes for children in the disaster area, Aunt Wang finished 40% of the total number of pieces, and the rest was distributed to Uncle Zhang and Grandma Li at a ratio of 5:7. It is known that Aunt Wang made 60 more cotton-padded clothes than Uncle Zhang. how many?
为灾区小朋友做一批棉衣，王阿姨做完了总件数的40%，余下的按5：7分配给张叔叔和李奶奶，已知王阿姨做的棉衣比张叔叔多60件，这批棉衣共多少件？
<gadget id="calculator">5 + 7</gadget>
<output>12</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">12 / (3/5)</gadget>
<output>20</output>

<gadget id="calculator">20 - 12</gadget>
<output>8</output>

<gadget id="calculator">8 / 20</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">5 / 20</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) - (1/4)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">60 / (3/20)</gadget>
<output>400</output>

<result>400</result>