A truck drives from place A to place B, the length ratio of the traveled distance to the untraveled distance is 3:1, and it has traveled 27 kilometers. How many miles does the truck travel?
一辆货车从甲地开往乙地，已行驶路程与未行驶路程的长度比是3：1，已走了27千米．货车全程要行驶多少千米？
<gadget id="calculator">3 + 1</gadget>
<output>4</output>

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

<gadget id="calculator">27 / (3/4)</gadget>
<output>36</output>

<result>36</result>