Explanation :
To solve the multiplication problem 3.86 x 9.15, you can use a standard multiplication method:
3.86
x 9.15
-------
1930 (Multiply 5 by 3.86)
+ 38600 (Multiply 1 by 3.86 and shift one place to the left)
+ 7720 (Multiply 9 by 0.86 and shift one place to the left)
+3465 (Multiply 9 by 3.86 and shift two places to the left)
-------------------------
= 35.3779
Therefore, 3.86 multiplied by 9.15 equals 35.3779.