Question 1144203
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Convert "4 miles" to "pounds" by multiplying by unit fractions which change the units but keep the measurement the same.<br>
As an example of this, you can change "5 feet" to inches by multiplying by the unit fraction "12 inches/1 foot".  12 inches is equal to 1 foot, so the multiplication changes the units without changing the measurement.<br><pre>
             12 inches
   5 feet * ----------- = 60 inches
              1 foot</pre>
Using the appropriate unit fractions to convert "4 miles" to "pounds"...:<br><pre>
              5280 feet     12 inches       1 penny       0.0875 ounces     1 pound
   4 miles * ----------- * ----------- * ------------- * --------------- * ------------
                1 mile       1 foot       0.75 inches        1 penny        16 ounces</pre>
Multiplying all that out, you should find that 4 miles of pennies weighs less than a ton, which is 2000 pounds.