Build a cuboid swimming pool with a length of 30 meters, a width of 20 meters and a depth of 1.6 meters, and lay tiles on the bottom and surroundings of the pool. If 25 tiles are used per square meter, how many tiles are needed in total?
建造一个长方体游泳池，长30米，宽20米，深1.6米，在池的底面和四周铺砌瓷砖，如果每平方米用瓷砖25块，共需多少块？
<gadget id="calculator">30 * 20</gadget>
<output>600</output>

<gadget id="calculator">30 * 1.6 * 2</gadget>
<output>96</output>

<gadget id="calculator">20 * 1.6 * 2</gadget>
<output>64</output>

<gadget id="calculator">600 + 96 + 64</gadget>
<output>760</output>

<gadget id="calculator">760 * 25</gadget>
<output>19_000</output>

<result>19_000</result>