The sum of the sides of a cuboid is 90 cm, what is the sum of the three sides that intersect at a vertex
一个长方体棱长的总和是90厘米，相交于一个顶点的三条棱的和是多少
<gadget id="calculator">90 / 4</gadget>
<output>45/2 = around 22.5</output>

<result>45/2 = around 22.5</result>