ако log 2  0.3010 и log 3  0.4771 , стойността на log 5 512 е:
"log 5 512  log 512 / log 5  log 2  9 / log ( 10 / 2 )  9 log 2 / log 10 - log 2  ( 9 * 0.3010 ) / 1 - 0.3010  2.709 / 0.699  2709 / 699  3.876 отговор: e ."
multiply(0.3010, divide(0.3010, 0.4771))