Anyone know why GoogleHome is unable to calculate 135/4 or 135*4

"Hey google, what is 135 times 4" or "hey google what is 135 divided by 4"

Result is always: "I dont know " and displays a google search. But it is able to calculate 136/4 or 135/3. 135 +/- 4 works, just not 135 * 4

Tried it in Google Smart Display (1st gen)...

Any guesses?