A construction site uses (7/8) tons of yellow sand on the first day, the second day uses (6/7) tons of yellow sand on the first day, and the third day uses the second ton of yellow sand Day (2/3). How many tons of yellow sand was used on the third day?
某工地第一天用去黄沙(7/8)吨，第二天用去的黄沙吨数是第一天的(6/7)，第三天用去的黄沙吨数是第二天的(2/3)．第三天用去黄沙多少吨？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(7/8) * (6/7) * (2/3)</gadget>
<output>1/2 = around 0.5</output>

<result>1/2 = around 0.5</result>