The distance between A and B is 16 kilometers. 40 students go from A to B. Now there is a horse-drawn carriage whose speed is three times the student’s walking speed. The horse-drawn carriage can take 10 people at a time. First, send 10 students from A to B. The rest move forward on foot, the carriage returns immediately to B, on the way to the walking students, pick up 10 students to B, and the rest of the students continue until the carriage sends all the students to B, how many kilometers will the carriage travel in total? ?
AB两地相距16千米，40名学生从A地去B地，现在有一辆马车，车速是学生步行速度的3倍；马车每次可乘坐10人，在A先将10名学生送往B地，其余步行前进，马车到B地立即返回，途中到步行学生，再接10名学生到B地，余下的学生继续进，…直到马车把所有学生送到B地，马车共行多少千米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<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">16 * (2/3) * (3/4) * 16 * (2/3) * (3/4) * (2/3) * (3/4) * (2/3) * (3/4)</gadget>
<output>16</output>

<gadget id="calculator">16 * (2/3) * (3/4) * (2/3) * (3/4) * 16 * (2/3) * (3/4) * (2/3) * (3/4) * (2/3) * (3/4)</gadget>
<output>8</output>

<gadget id="calculator">16 * (2/3) * (3/4) * (2/3) * (3/4) * (2/3) * (3/4) * 16 * (2/3) * (3/4) * (2/3) * (3/4) * (2/3) * (3/4)</gadget>
<output>4</output>

<gadget id="calculator">16 + 16 + 8 + 4</gadget>
<output>44</output>

<result>44</result>