box of cuboid biscuits is 15 cm long, 10 cm wide, and 6 cm high. Stick a piece of label paper with a height of 0.5 decimeters around it. How many square centimeters does the area of this label paper have?
一盒长方体饼干盒，长15厘米，宽10厘米，高6厘米．在它的四周贴上一张高为0.5分米的商标纸，这张商标纸的面积有多少平方厘米？
<gadget id="calculator">0.5 * 10</gadget>
<output>5</output>

<gadget id="calculator">15 * 5 * 2</gadget>
<output>150</output>

<gadget id="calculator">10 * 5 * 2</gadget>
<output>100</output>

<gadget id="calculator">150 + 100</gadget>
<output>250</output>

<result>250</result>