Hi Faisal,
Doing multiple additions is the same. Except instead of adding 2 digits in one step, you add the digit of all numbers. It is just as easy to do.
So in the first step you add the first digit of all numbers i.e. 1 + 6 + 2 + 4 + 2 + 2 = 17
1457
6532
2354
4563
2342
+2313
17
Next step you add the second digit of the all the numbers i.e. 4 + 5 + 3 + 5 + 3 + 3 = 23
1457
6532
2354
4563
2342
+2313
17
+23
Combining the result from the previous two steps (17 & 23) we get 193.
1457
6532
2354
4563
2342
+2313
193
Next step 5 + 3 + 5 + 6 + 4 + 1 = 24
1457
6532
2354
4563
2342
+2313
193
+24
Combining the result from the previous two steps (193 & 24) we get 1954.
1457
6532
2354
4563
2342
+2313
1954
Next Step 7 + 2 + 4 + 3 + 2 + 3 = 21
1457
6532
2354
4563
2342
+2313
1954
+21
Combining the result from the previous two steps (1954 & 21) we get 193561.
1457
6532
2354
4563
2342
+2313
19561
You have the final answer 19,561