Noise is harmful to people's health, and afforestation can reduce the noise (1/8). If a car emits a sound of 80 decibels, how many decibels do people hear now?
噪音对人的健康有害，绿化造林可使噪音降低(1/8)，如果汽车发出80分贝的声音，人现在听到的声音是多少分贝？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/8)</gadget>
<output>7/8 = around 0.875</output>

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

<result>70</result>