It is known that sound travels about 340 meters per second in the air. Xiao Ming shouted at the cliff, and the sound was reflected back after reaching the cliff. After Xiao Ming shouted for 24 seconds, he heard the voice coming back. How far is he from the cliff?
已知声音在空气中每秒约传播340米，小明对着山崖喊一声，声音传到山崖后被反射回来．小明喊了24秒后听到传回来的声音，他离山崖有多远？
<gadget id="calculator">24 / 2</gadget>
<output>12</output>

<gadget id="calculator">340 * 12</gadget>
<output>4_080</output>

<result>4_080</result>