<PRE><B>Question 813547</B>
x = ceiling( n/a )
y = ceiling( m/a )
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the ceiling() function: 
ceiling( 252.7 ) = 253
ceiling( 253.1 ) = 254
ceiling( 253.5 ) = 254
ceiling( 253.9 ) = 254
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What is the least number of flagstones needed to pave the Square? 
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Answer:
x * y
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Solve and graph linear equations:
https://sooeet.com/math/linear-equation-solver.php
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Solve quadratic equations, quadratic formula:
https://sooeet.com/math/quadratic-formula-solver.php
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Convert fractions, decimals, and percents:
https://sooeet.com/math/fraction-decimal-percent.php
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Calculate and graph the linear regression of any data set:
https://sooeet.com/math/linear-regression.php</PRE>