It used to take 20 minutes for Xiao Ming to go from home to school, but now the speed has increased (1/3), how many minutes will it take now?
小明从家到学校，原来要用20分钟，现在速度提高了(1/3)，现在要用多少分．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 + (1/3)</gadget>
<output>4/3 = around 1.333333</output>

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

<gadget id="calculator">20 * (3/4)</gadget>
<output>15</output>

<result>15</result>