It takes Xiao Ming 35 minutes to walk from home to school, and only 10 minutes to ride a bicycle. He started from home by bicycle and walked for 8 minutes. The bicycle broke down and he changed to walk. How many minutes did it take Xiao Ming to go from home to school?
小明从家到学校，步行需要35分钟，骑自行车只要10分钟．他骑自行车从家出发，行了8分钟自行车发生故障，即改步行，小明从家到学校共用了多少分钟？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) * 8</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">(1/5) / (1/35)</gadget>
<output>7</output>

<gadget id="calculator">8 + 7</gadget>
<output>15</output>

<result>15</result>