Noise is harmful to human health, and afforestation can reduce noise. The sound that people hear when a bus passes by is 80 decibels, and the green belt can reduce the noise (1/8), how many decibels will the sound heard by people after the green belt reduces the noise?
噪音对人的健康有害，绿化造林可降低噪音．大客车走过时人听到的声音是80分贝，绿化带可使噪音降低(1/8)，绿化带降低噪音后人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>