Change the water in a swimming pool with a length of 50 meters, a width of 30 meters, and a depth of 1.5 meters. When the water is 30 cm away from the edge of the pool, close the water inlet valve. How many cubic meters of water are there in the swimming pool at this time?
给长是50米、宽是30米，深1.5米的游泳池换水，当水离池边还有30厘米的时候关上进水阀门．这时的游泳池里共有多少立方米的水？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1.5 - (3/10)</gadget>
<output>1.2</output>

<gadget id="calculator">50 * 30 * 1.2</gadget>
<output>1_800</output>

<result>1_800</result>