Translate numbers to French The French spell out numbers in a peculiar way. 


1-16 are "normal"
17-19 are spelled out 10+7. 10+8, 10+9.
20-69 are "normal" (OK, OK! Not really, but they are in this challenge)
70-79 are 60+10, 60+11 ... 60+10+7, 60+10+8, 60+10+9. 
80-99 are 4*20, 4*20+1, 4*20+2 ... 4*20+16, 4*20+10+7, 4*20+10+8, 4*20+10+9 


Challenge:

Take a positive integer in the range [1,100], and output it the "French way". You must output it exactly as it's shown below, with * and +, so 97 is 4*20+10+7, not [4 20 10 7] or something else.

Test cases:

1  - 1
.. - ..
16 - 16
17 - 10+7
18 - 10+8
19 - 10+9
20 - 20
21 - 21
.. - ..
69 - 69
70 - 60+10
71 - 60+11
72 - 60+12
77 - 60+10+7
78 - 60+10+8
79 - 60+10+9
80 - 4*20
81 - 4*20+1
82 - 4*20+2
.. - ..
90 - 4*20+10
91 - 4*20+11
96 - 4*20+16
97 - 4*20+10+7
98 - 4*20+10+8
99 - 4*20+10+9
100 - 100
Excel, 153 149 Bytes

=IF(OR(A1&lt;17,A1&gt;99,AND(A1&gt;19,A1&lt;70)),A1,IF(A1&lt;20,"10+"&amp;A1-10,IF(A1&lt;80,"60","4*20")&amp;IF(A1=80,,IF(MOD(A1,20)&gt;16,"+10+"&amp;MOD(A1,20)-10,"+"&amp;MOD(A1,20)))))


I'm sure this could be better, I struggled to find an efficient way to account for #80.

edit: Consolidated the 'Normal' cases better to save 4 bytes.  #80 still sucks.

Can't find a specific answer on here, not sure the rules of code-golf tbh.  Can I use multiple cells in Excel, and add the byte count of each?

ie. For an input in cell A1

A2: 11 Bytes

=MOD(A1,20)


A3 (result): 125 Bytes

=IF(OR(A1&lt;17,A1&gt;99,AND(A1&gt;19,A1&lt;70)),A1,IF(A1&lt;20,"10+"&amp;A1-10,IF(A1&lt;80,"60","4*20")&amp;IF(A1=80,,IF(A2&gt;16,"+10+"&amp;A2-10,"+"&amp;A2))))


For a total of 136?