Qingqing plans to make a paper box. 40 cm long and 35 cm wide. Subtract a square of 5 cm from the four corners, fold it and glue it into a cuboid box without a cover, what is the surface area of this cuboid box?
晴晴打算做一个纸盒．长40厘米，宽35厘米．四个角减去5厘米正方形，折好并粘成一个无盖长方体盒子，求这个长方体盒子的表面积？
<gadget id="calculator">40 * 35</gadget>
<output>1_400</output>

<gadget id="calculator">5 * 5 * 4</gadget>
<output>100</output>

<gadget id="calculator">1_400 - 100</gadget>
<output>1_300</output>

<result>1_300</result>