\r\n" );
document.write( "Let's use some unit multipliers, OK?\r\n" );
document.write( "\r\n" );
document.write( "Note: A 'number of units' can be considered as 'the number multiplied by the unit'.\r\n" );
document.write( "\r\n" );
document.write( "



\r\n" );
document.write( "



\r\n" );
document.write( "\r\n" );
document.write( "Multiply by unit multipliers, i.e., fractions that equal 1 numerically, because\r\n" );
document.write( "they have equal numerators and denominators in different units.\r\n" );
document.write( "\r\n" );
document.write( "Notice how we plan the unit multipliers in numerators and denominators so that\r\n" );
document.write( "the units we want to eliminate will cancel and the ones we want to keep will\r\n" );
document.write( "not.\r\n" );
document.write( "\r\n" );
document.write( "









\r\n" );
document.write( "\r\n" );
document.write( "Go on a unit-canceling spree: \r\n" );
document.write( "\r\n" );
document.write( "









\r\n" );
document.write( "\r\n" );
document.write( "The only unit that did not cancel was 'feet'.\r\n" );
document.write( "\r\n" );
document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "

\r\n" );
document.write( "\r\n" );
document.write( "Edwin
\n" );
document.write( "