The noise produced by the car is 80 decibels. After passing through the woods, the noise is the original (7/8). How many decibels is the noise after passing through the woods?
汽车产生的噪音是80分贝，经过树林传过来后噪音为原来的(7/8)，经过树林后的噪音是多少分贝？
<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">80 * (7/8)</gadget>
<output>70</output>

<result>70</result>