The children's clothing store sold 5 boxes of clothes today, 20 pieces in each box, with a total income of 4,500 yuan. How much is the average price of each piece of clothes?
儿童服装店今天卖出5箱衣服，每箱20件，共收入4500元，平均每件衣服多少钱？
<gadget id="calculator">20 * 5</gadget>
<output>100</output>

<gadget id="calculator">4_500 / 100</gadget>
<output>45</output>

<result>45</result>