Santiago tried to evaluate an expression step by step.
(
4
⋅
1
0
9
)
⋅
0.00003
=
(
4
⋅
1
0
9
)
⋅
(
3
⋅
1
0
−
5
)
Step
1
=
(
4
⋅
3
)
⋅
(
1
0
9
⋅
1
0
−
5
)
Step
2
=
12
⋅
1
0
14
Step
3

=
=
=


(4⋅10
9
)⋅0.00003
(4⋅10
9
)⋅(3⋅10
−5
)
(4⋅3)⋅(10
9
⋅10
−5
)
12⋅10
14



Step 1
Step 2
Step 3


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