The length of a cuboid is 10 cm, the width is 70% of the length, and the ratio of height to length is 3:5. What is the surface area of this cuboid in square centimeters?
一个长方体的长是10cm，宽是长的70%，高与长的比是3：5．这个长方体的表面积是多少平方厘米？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">10 * (7/10)</gadget>
<output>7</output>

<gadget id="calculator">10 * 7</gadget>
<output>70</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">10 * (3/5)</gadget>
<output>6</output>

<gadget id="calculator">10 * 6</gadget>
<output>60</output>

<gadget id="calculator">7 * 6</gadget>
<output>42</output>

<gadget id="calculator">70 + 60 + 42</gadget>
<output>172</output>

<gadget id="calculator">172 * 2</gadget>
<output>344</output>

<result>344</result>