A truck travels uphill at a speed of 54km/h for (1/3) hour and downhill at a speed of 76km/h for (1/2) hour, how many kilometers per hour does the truck travel uphill and downhill on average? ?
一辆卡车以每小时54km的速度上坡行了(1/3)小时，以每小时76km的速度下坡行了(1/2)小时，卡车上、下坡平均每小时行了多少千米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">54 * (1/3)</gadget>
<output>18</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">76 * (1/2)</gadget>
<output>38</output>

<gadget id="calculator">18 + 38</gadget>
<output>56</output>

<gadget id="calculator">(1/3) + (1/2)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">56 / (5/6)</gadget>
<output>336/5 = around 67.2</output>

<result>336/5 = around 67.2</result>