We can see that using the box method, 231 multiplied by 7 equals 1,617.
The box method is a visual multiplication technique that breaks down the multiplication process into smaller steps by using boxes or grids. Let's multiply 231 by 7 using the box method:
Step 1: Create a box or grid with three columns (one for each digit in 231) and one row (for the number 7).
2 3 1
7
Step 2: Starting with the rightmost digit of 7 (which is 7), multiply it by each digit of 231 separately, placing the products in the respective boxes.
2 3 1
7
_________
14 21 7
Step 3: Align the numbers in their correct positions and add the products diagonally.
2 3 1
7
_________
14 21 7
+ 14 21 7 0 (Pad with a zero as we are moving to the next digit)
_____________
1 6 1 7
Step 4: Finally, sum the results to get the final product:
231 multiplied by 7 equals 1,617.
Therefore, using the box method, 231 multiplied by 7 equals 1,617.