A scientific research ship is in the sea to measure the depth of a certain place. From the sea to the bottom of the sea, the signal is received in 6 seconds. The propagation speed of ultrasonic waves in seawater is 1450 meters per second. How deep is the sea here?
科学考察船在海里测量某处海深．由海面向海底，6秒钟收到信号．超声波在海水中的传播速度是每秒1450米，此处海深多少米．
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 * 1_450</gadget>
<output>4_350</output>

<result>4_350</result>