The phrase "figure to be" refers to estimating or assuming something to be a certain way. There are several synonyms that can be used in its place, such as "calculate," "gauge," "predict," "project," and "estimate." Each of these words implies a different level of certainty or accuracy in the estimation process. For instance, "calculate" suggests a more precise or mathematical determination, while "estimate" implies a more general approximation. "Gauge" and "predict" both suggest a sense of measuring or forecasting, but with differing connotations. By using these synonyms, one can better convey the intended meaning and degree of certainty when discussing an estimation or assumption.