40
General calculations
Multiplication
Question
20 × 15
Answer
Align “20” on the scale
to inner “10”. The answer
“30” (300) on the scale
corresponds to inner “15”.
60
55
50
45
40
35
30
25
20
15
10
11
12
13
14
16
17
18
19
21
22
23
24
90
8
0
70
F
U
E
L
L
B
S
.
LIT
ER
S.
OI
L L
BS
.
IMP
GA
L.
GAL.
US.
55
50
NAUT.
45
40
35
30
25
20
15
1
0
90
8
0
70
11
14
16
17
18
19
21
22
23
24
STA
T.
K
M
.
1:10
1:
20
1:3
0
1:
40
1:50
2:
00
2:30
3:00
3:30
4:00
4:
30
5:00
6:0
0
7:00
8:00
9:00
