It takes Xiaodong 35 minutes to walk from Jiadao School to school, and 15 minutes to ride a bicycle. One day, Xiaodong started from home and had just ridden for 9 minutes. Suddenly, it rained heavily and the road was muddy, so he had to walk with the bike, which was slower than usual (1/8). How many minutes will it take to get to school.
小东从家道学校步行到学校要35分钟，如果骑自行车要15分钟．一天小东从家出发，刚骑了9分钟的车，突然天降大雨，路面泥泞，只好推着车子步行，比平时步行慢了(1/8)．还要多少分钟才能到校．
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/15) * 9</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 35</gadget>
<output>1/35 = around 0.028571</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/8)</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">(1/35) * (7/8)</gadget>
<output>1/40 = around 0.025</output>

<gadget id="calculator">(2/5) / (1/40)</gadget>
<output>16</output>

<result>16</result>