A swimming pool is 50 meters long, 30 meters wide and 3.5 meters deep. How many square bricks are needed to lay square bricks with a side length of 1 decimeter on the four walls and the bottom of the swimming pool.
一个游泳池长50米，宽30米，深3.5米．在游泳池的四壁和底部铺上边长1分米的方砖，需要多少块方砖．
<gadget id="calculator">50 * 30</gadget>
<output>1_500</output>

<gadget id="calculator">3.5 * 10</gadget>
<output>35</output>

<gadget id="calculator">50 * 35</gadget>
<output>1_750</output>

<gadget id="calculator">30 * 35</gadget>
<output>1_050</output>

<gadget id="calculator">1_500 + 1_750 + 1_050</gadget>
<output>4_300</output>

<gadget id="calculator">4_300 * 2</gadget>
<output>8_600</output>

<gadget id="calculator">8_600 - 1_500</gadget>
<output>7_100</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) * (1/10)</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">7_100 / (1/100)</gadget>
<output>710_000</output>

<result>710_000</result>