The newly built cuboid indoor swimming pool in Zhuyuan Elementary School is 30m long, 20m wide and 1.6m deep, and tiles are required on the bottom and around the pool. If 25 tiles are used per square meter, how many tiles are needed in total?
祝垸小学新建的长方体室内游泳池，长30m，宽20m，深1.6m，在池的底面和四周均需铺瓷砖．如果每平方米用瓷砖25块，共需要瓷砖多少块？
<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>