how to use a construction calculator

2:02

کوتاه

20:35

7:30

8:12

20:34

23:10

10:00

12:46

10:00

11:35

13:40

8:13

9:00

9:35

8:23

3:09

4:41

27:12

19:33

11:07

8:38

4:41

12:11

16:07

20:59

4:31

10:49

6:29

12:20

7:21

1:56

1:56

6:51

20:00

10:57

2:01

9:33

3:27

2:16