Xiaohong (2/3) walks 2 kilometers in an hour, Xiaojun walks 3 kilometers in 45 minutes, who is faster? How many kilometers per hour?
小红(2/3)小时走2千米，小军45分钟走3千米，谁快些？每小时快多少千米？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 / (2/3) / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / (2/3) / (3/4)</gadget>
<output>4</output>

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

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

<result>1</result>