A piece of ordinary milk is 42 yuan. You can buy 6 pieces of children's milk for the price of 9 pieces of ordinary milk. How much is each piece of children's milk?
一件普通牛奶42元，买9件普通牛奶的价钱可以买6件儿童牛奶，每件儿童牛奶多少钱？
<gadget id="calculator">9 / 6</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">42 * (3/2)</gadget>
<output>63</output>

<result>63</result>