Xiaohong walks (3/4) kilometers in (1/4) hour, calculate how many kilometers she walks per hour, and what is the formula.
小红(1/4)小时走了(3/4)千米，计算她每小时走多少千米，列式是多少．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

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

<gadget id="calculator">(3/4) / (1/4) / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) / (1/4)</gadget>
<output>3</output>

<result>3</result>