It takes Dongdong 60 minutes to walk to school every day, and 15 minutes to ride a bicycle. Once he met Archie after riding a bicycle for 6 minutes, and they walked to school together. How long did it take him to get to school this time?
冬冬每天上学步行要花费60分钟，骑车要花费15分钟，有一次他骑车骑了6分钟之后遇到了阿奇，于是一起步行前往学校，则这一次他到学校花了多长时间？
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/15) * 6</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 / 60</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">(3/5) / (1/60)</gadget>
<output>36</output>

<gadget id="calculator">36 + 6</gadget>
<output>42</output>

<result>42</result>