カラツバ法
X = 32 , 463 {\displaystyle X=32,463} ( x 1 := 32 , x 0 := 463 ) {\displaystyle (x_{1}:=32,x_{0}:=463)} 、 Y = 38 , 030 {\displaystyle Y=38,030} ( y 1 := 38 , y 0 := 30 ) {\displaystyle (y_{1}:=38,y_{0}:=30)} 、 b = 1000 {\displaystyle b=1000} とすると、
z 2 := x 1 y 1 = 1216 {\displaystyle z_{2}:=x_{1}y_{1}=1216}
z 0 := x 0 y 0 = 13890 {\displaystyle z_{0}:=x_{0}y_{0}=13890}
z 1 := z 2 + z 0 − ( x 1 − x 0 ) ( y 1 − y 0 ) = 1216 + 13890 − ( − 431 ) ( 8 ) = 18554 {\displaystyle z_{1}:=z_{2}+z_{0}-(x_{1}-x_{0})(y_{1}-y_{0})=1216+13890-(-431)(8)=18554}
Z = 1216 b 2 + 18554 b + 13890 = 1 , 216 , 000 , 000 + 18 , 554 , 000 + 13 , 890 = 1 , 234 , 567 , 890 {\displaystyle Z=1216b^{2}+18554b+13890=1,216,000,000+18,554,000+13,890=1,234,567,890}