Is there any way to change lead score in multiples. A lead score can be added subtracted, but how can it be multiplied?
For that you would need to use the webhook feature. This add-on from Hoosh which is free and really quite good: Excel Formulas for Marketo – Marketo LaunchPoint
Here you would create a Webhook using the multiplier you want to use and map the response to a field, you can also add score fields together.