P
r
o
v
e
t
h
a
t
:
0
.
87
×
0
.
87
×
0
.
87
+
0
.
13
×
0
.
13
×
0
.
13
0
.
87
×
0
.
87
-
0
.
87
×
0
.
13
+
0
.
13
×
0
.
13
=
1
Match the items on the right to the items on the left.
Check
OK
STEP1
STEP2
STEP3
STEP4