They add up to 656
456 plus what equals 1242.\
656 + 662 = 1,318
456 + 789 + 123 + 123456789 = 123458157
456
x=0
pi + (456 x (234x78)) = 8322915.142.
Decomposition into decimal digits (or separating out into place values).
456 multiplied by 1 equals 456.
656 + 46645 = 47,301
656/7 = 93.714 (approx)
456 plus 100 is equal to 556