From A to B, it takes Xiao Ming 20 minutes to ride a bicycle, and 50 minutes to walk. He rode the bicycle for 8 minutes before walking. How many minutes did it take him to arrive at B?
从甲地到乙地，小明骑自行车要20分钟，如果步行要50分钟．他先骑8分钟的自行车后再步行，到乙地时一共用了几分钟？
<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/20) * 8</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 50</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">(3/5) / (1/50)</gadget>
<output>30</output>

<gadget id="calculator">8 + 30</gadget>
<output>38</output>

<result>38</result>