Hello andru. Welcome to this forum.
The way that formula is presented in the School lesson is very misleading.
Here is the part of that lesson that we’re talking about:

Those formulas are badly presented.
To be mathematically correct, [B]they should read:[/B]
USD/JPY, at an exchange rate of 119.80,
Pip value = (.01 / 119.80) x 100,000 = $8.34 per pip
USD/CHF, at an exchange rate of 1.4555,
Pip value = (.0001 / 1.4555) x 100,000 = $6.87 per pip
In cases where the U.S. dollar is not quoted first, the formula is slightly different.
EUR/USD, at an exchange rate of 1.1930,
Pip value = (.0001 / 1.1930) X 100,000 = €8.38
€8.38 x 1.1930 = $9.99734 rounded up will be $10 per pip
GBP/USD, at an exchange rate or 1.8040,
Pip value = (.0001 / 1.8040) x 100,000 = £5.54
£5.54 x 1.8040 = 9.99416 rounded up will be $10 per pip.
.