There is a piece of cotton cloth 3 meters long, which can be used to make 4 children's pajamas of the same size. What percentage of this cloth does each child's pajamas use? How many meters of cloth is used for each child's pajamas?
有一块棉布长3米，正好可以做4件同样大小的儿童睡衣．每件儿童睡衣会用掉这块布的几分之几？每件儿童睡衣用布多少米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 / (1/4)</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>