A giant spider is discovered.  It weighs 2.5 times the previous largest spider, which weighed 6.4 ounces.  Each of its legs has a cross-sectional area of .5 square inches.  How much pressure in ounces per square inch does each leg undergo?
The spider weighs 6.4*2.5=
<gadget id="calculator">6.4*2.5</gadget>
<output>16</output>
16 ounces.
So each leg supports a weight of 16/8=
<gadget id="calculator">16/8</gadget>
<output>2</output>
2 ounces.
That means each leg undergoes a pressure of 2/.5=
<gadget id="calculator">2/.5</gadget>
<output>4</output>
4 ounces per square inch.

<result>4</result>