A snake's head is one-tenth its length. If a snake is 10 feet long, calculate the length of the rest of its body minus the head.
A snake's head is one-tenth its length, which is 1/10*10 = 
<gadget id="calculator">1/10*10</gadget>
<output>1</output>
1 foot.
Since the snake's head is 1 foot, the rest of its body is 10-1 = 
<gadget id="calculator">10-1</gadget>
<output>9</output>
9 feet long.

<result>9</result>